I am 72 and 100% caregiver. My wife is 77 who has been bedridden due to health issues. I am spending $25,000 or so extra each year for outside help from CNA. But also for supplies such as diapers, creams, soaps, bed pads, equipment like wheel chair etc, vitamins, supplements, wipes etc etc etc. I know that some of these can be deducted as part of medical deductions, but it is so small compared to the spending for the other needed stuff.
Otherwise, keep a running total of what is spent along with the receipts. At tax time contact a tax preparer or a CPA who is familiar with such type of deductions.
I don't know of a way that some things like soap or creams could be deducted as medical costs unless they were specifically prescribed or recommended by a doctor.
I can only imagine how frustrating this must be for you and hope that others have some suggestions to offer.